HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 457

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

19.3
The following AC timing chart represents the AC characteristics, not signal functions. For signal
functions, see the explanation in the text.
19.3.1
Table 19.4 Clock Timing
Case A: V
Case B: V
*: Normal products. Ta = –40 to +85°C for wide-temperature range products.
Item
EXTAL input high level
pulse width
EXTAL input low level
pulse width
EXTAL input rise time
EXTAL input fall time
Clock cycle time
Clock high pulse width
Clock low pulse width
Clock rise time
Clock fall time
Reset oscillation settling
time
Software standby
oscillation settling time
AC Characteristics
Clock Timing
CC
CC
= 5.0 V ±10%, V
= 3.0 to 5.5 V, V
Sym-
bol
t
t
t
t
t
t
t
t
t
t
t
EXH
EXL
EXr
EXf
cyc
CH
CL
Cr
Cf
OSC1
OSC2
SS
SS
= 0 V, Ta = –20 to +75°C*
= 0 V, Ta = –20 to +75°C*
Min
20
20
—
—
80
30
30
—
—
10
10
12.5 MHz
Case A
Max
—
—
10
10
—
—
—
10
10
—
—
Min
10
10
—
—
60
20
20
—
—
10
10
16.6 MHz
Max
—
—
5
5
500
—
—
5
5
—
—
Case B
Min
10
10
—
—
50
20
20
—
—
10
10
20 MHz
Max
—
—
5
5
500
—
—
5
5
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ms
HITACHI 449
Figures
19.1
19.1, 19.2
19.2
19.3